Curtain-roller



(No Model.)

A. SWEETLAND.

CURTAIN ROLLER.

No. 399,448. Patented Mar. 12. 1889.

UNiTEn STATES PATENT OFFICE.

CURTAIN-ROLLER.

SPECIFICATION forming part of Letters Patent No. 399,448, dated March12, 1889.

Application filed August 13, 1888- Serial No. 282,529. (No model.)

T 0 aZZ whom it may concern:

Be it known that I, ALVAH SWEETLAND,of Syracuse, county of Onondaga, inthe State of New York, a citizen of the United States, have inventedcertain new and useful Improvements in Curtain-Rollers, of which thefollowing is a specification, reference beinghad to the accompanyindrawings, in which Figure 1 is an end elevation with the cap removed;Fig. 2, a vertical section central to the spindle; Fig. 8, a plan viewof the front of bracket; Fig. 4:, a like view of its back; Fig. 5, anend view of same; Fig. 6, a side elevation thereof.

My invention relates to spring-actuated curtain-rollers and to thelocking devices to catch the roller at any desired point and hold itagainst rotation, and especially to locking devices which are actuatedby the quick upward rotation of the roller, as contradistinguished fromthose rollers in which the looking device operates by the slow rotationof the roller, and, further, to those which lock by means of a pawlthrown outward from the center by contact with a hub upon the end of theroller and locked into a rim of substantially the same diameter as theroller, and look by means of a hook drawn into notches in the rim, ascontradistinguished from those which employ a gravity-pawl engaging witha ratchet upon the hub; and my invention also relates to the bracketsfor supporting the roller.

The obj ectof my invention is to produce a spring shade-roller whichshall be locked against rotation by the quick upward movement of thecurtain.

My invention consists in the several novel features of construction andoperation hereinafter described, and which are specifically set forth inthe claim hereunto annexed.

It is constructed as follows:

A is a spring shade-roller, of ordinary construction as to the roll,spring, and spindle within the roll.

B is the spindle, having a flattened head, 1, and 2 is an arm secured tothe spindle and having hooked pawl 3 pivot-ally connected to its outerend, 4: being the hook, and 5 being a lug or stud upon the back side ofthe pawl substantially opposite the hook.

C is a plate secured to the end of the roller and provided with acentral rectangular boss, 3 (5, having angular corners 7, and furtherprovided with the multiple-curved flanges 8, the ends of which arebeveled, as shown, creat- 1 ing the openings 9 between theflange-sections. It will be observed that each corner or shoulder 7 hasan opening, 9, opposite. D is my bracket, consisting of a body, a base,and a head, which head is provided with a vertical slotway, 10, and ahorizontal slotway, 11, opening into the slotway 10. Both of theseslotways are beveled, substantially as shown, and backward from theouter face of the bracket, in order to reduce the bearin -surface andprevent the gudgeon 12 of the rollerfrom binding. 'When this gudgeon 1is introduced into the bracket, it has a tril angular bearing, twov ofthe bearing-points i being the corners at the intersection of the lslotways, these corners being beveled or rounded, if desired. l It isoperated as follows: The rotation of the roll to wind up the curtaincarries with it the annular notched riln, the spindle and 1 the arm uponthe spindle remaining stationl ary with the pawl dependent and restingupon 1 the periphery of the hub, or contiguous thereto, so that thequick rotation of the roll lthrows the shoulder upon the hub against lthe shoulder upon the pawl, and when the l otation is quick enough thepawl is thrown upward, so that the point of the hook will catch upon abeveled point or edge of one of the rim-notches, and the movement of theroll will carry the edge of this notch clear into l the hook, thusgiving a positive lock in such l a manner that the pawl-hook cannot bedisl engaged from the edge of the notch by any jumping or recoil of theroll on account of its 1 quick stoppage. I bevel the edges of thenotches, first, in order that the hook may the i more readily engagewith the thin edge, and, l secondly, in order that the edge of the notch1 may fit within the cavity of the hook closely l and tightly byfrictional contact. li It will be observed that the flanges h tol lgether constitute an annular rim, and the spaces between form bevelednotches, with which the .hook engages; and that if from any cause thepawl is disengaged from a l notch the roll cannot wind up so as to carrythe curtain to the top of the window, as the lug 5 will be engaged byone of the corners or shoulders 7, which will then be in motion, andwill throw the pawl into one of said notches and prey en t furthermovement of the roller.

It will also be seen that the hook of the pawl operates as a positivelock to hold the roll againstrebound and until it is released by drawingdown the curtain.

I am aware that gravity-pawls engaging with notches in an annular rimhave hereto fore been used; but I am not aware that a hooked pawl thrownoutward by a knocker secured to the roller, so as to hook into a bevelednotch in an annular rim, has ever been used.

\Vhat I claim, and ters Patent, is

In a curtain-roller, the combination, with the roll proper, aplateprovided with *a rectangular central hub the corners of which constituteshoulders, and multiple-curved desire to secure by Letflanges oppositethe straight sides of the hub with spaces or openings between themopposite and equal in number to the corners or shoulders of saidrectangular hub, of a stationary spindle, a stationary spindle, a pawl,23, providing a deep notch for the effectual en gagement with the endsof said pawl being clined-face lug, 5, at the back of the pawl oppositethe hook 4, whereby of the roll said lug is engaged by any one of saidshoulders and the hook of the pawl thrown into flanges, substantially asshown and described.

arm upon the having a hooked end, at,

flanges, said pivoted to the arm, and an iiiwith the rotation engagementwith one of said In Witness whereof I have hereunto set my hand this25th day of July, 1888.

ALVAII SIYEETLAND.

In presence of O. \V. SMITH, SAM. H. WANDELL.

